Rotary tool and attachment therefor



L Jan. 18, 1944.' F. P. GRANAT ROTARY TOOL AND ATTACHMENT THEREFOR Filed Get. l, 1940 D. c N

Y .y l AZQRNEY' Patented Jan. 18, 1944 UNITED STATESA PATENT OFFICE f ROTARY TOOL AND ATTACHMENT THEREFOR Frank P. Granat, Woodside, Long Island, N.v Y. Application October 1, 1940, Serial No. 359,186

7 Claims. ,(Cl. 145-67) spaced at varying distances from the turning axis which is disposed transversely to the axis of the handle.

Another object of my invention is to provide a manually actuable rotary tool and attachment therefor by means of which a varying turning torque may be applied.

Another object of my invention is to provide a rotary tool and attachment wherein means are provided for steadying the rotary operative member of the tool.

Another object of my invention is to provide a rotary tool and attachment of the character described which shall be simple and economical to manufacture, shall be rug-ged in construction, and highly eilicient for the purposes set forth.

Other objects of this invention will in part be obvious and in part hereinafter pointed out.

The invention accordingly consists in the feaf tures of construction, combinations of elements, and arrangement of parts which will be exempliiied in the construction hereinafter described, and of which the scope of application will be indicated in the claims.

In the accompanying drawing in which are shown several embodiments `of my invention,

Fig. 1 is a side sectional view of a screw driver and screw driver attachment embodying my invention;

Fig. 2 is a plan View thereof;

Fig. 3 is a sectional view taken substantially along the line 3-3 of Fig; 1;

Fig. 4 is a sectional view taken substantially along the line fl-6 of Fig. 1;

Fig. 5 is an enlarged sectional view taken substantially along the line 5-5 of Fig. 1; and

Fig, 6 is a perspective view of an auxiliary socket'tool attachment adapted to be used with my invention,

Referring now to the drawing, It) is a screw driver comprising a handle II within which is disposed one end of a shank l2 having a screw driver blade I3 formed at the other end thereof. For detachably securing the shank I2 to the handle II an axial bore I4 is provided in the handle EI, said bore being shaped similarly to the contours of the shank I2. Said handle II is also provided with a pin I5 having a reduced portion IG which is adapted to be received within an aperture I'I in the shank I2. The upper end of the pin l5 is attached to one end of a leaf spring I8 by means of a rivet head I9 integlal with the pin I5. The other end of said spring I8 is suitably fixed to the handle I las by a rivet 20. If desired a small depression 2l may be provided on the portion of the handle underlying the free end of the spring I8 in orderto facilitate' the insertion of a fingernail beneath the free end of the spring, when it is desired to raise the pin I5 and release the shank I2.

In accordance with my invention I provide a member slidably and rotatably mounted on the shank I2 which may comprise a two-part casing 25 held in assembled relationship by a pair of rivets 26. The casing is prevented from slipping o the shank by the Width of the blade I3 and by the handle.

Associated with said member is means for detachably holding and rotating an auxiliary rotary tool about an axis angularly disposed relative to the shank I2. of meshing bevel gears 2 and 28 rotatably and non-slidably held in recesses formed for this purpose in the casing 25. lOne of said gears 2l is adapted to be rotated by the shank I2, the other gear 28 being adapted to rotate an auxiliary rotary tool. In` order to cause the bevel gear and shank I2 to rotate together in any position of the casing 25 along the shank I2, the gear 21 is provided with a central bore 29 of non-circular cross-section which corresponds in outline to the transverse proiile of the shank I2.

In the embodiment of my invention herein shown, both the bore and the shank are square. However, any other non-circular outline may be employed, such as for example splined, triangular or oval, or a circular shank may be used if provided with a key. The bevel gear 28'i's also provided with a central aperture 3l! of non-circular contour within which is received a stub shank 3| having an auxiliary screw driver blade 32 formed on .the outer end thereof. Said aperture 35 and shank 3| are also of mating .noncircular contour so that the gear 28-and screw driver blade 32 will rotate together. Thus, when the shank I2 is turned by means of the handle I I while the casing 25 is held stationary, both the screw driver blades I3 and 32 will rotate. To facilitate gripping of the casing 25, oppositely disposed faces thereof may be slightly concaved, as indicated at 33.

While thev auxiliary tool has been'shown as turning about an axis perpendicular to that of the shank, other angles, such as 45, may be employed. l 1

In order to retain the casing 25 in' any desired position along the shank I2,.suitab1e means may be provided to cause frictional engagement between the casing 25 and the shank I2. Said Said means may comprise a pair means may comprise a split spring ring 34 disposed in an annular groove 35 formed in the shank of the bevel gear 2'1 around the bore 30..

the shank I2 so as to cause the gear 21 and associ-,

ated casing 25 to remain at any point along` the length of the shank I2 until the casing 25 is manually forced into a new position. Similar means indicated by primed numerals (Fig. are provided in the shank of thebevel gear 28 `in order to frictionally hold the shank 3| and theV auxiliary screw driver blade 32 therein.

My device may be employed in several ways.

Thus, the blade I3 may be caused to engage a slot in a screw .and thev handle rotated in the well ,known fashion to turn the screw. In order to facilitate this operation, the casing may be slid down the shank I2 and disposed adjacent the blade I3 so that while the blade i3 is being turned the concave surface 33 of the casing may be gripped between the thumb and index ngers to steady the blade I3 and prevent it from slipping out of the slot.

Also,` when a screw is in an awkward position and insuicient room is present to insert an ordinary screw driver, the auxiliary blade 32 may be Ainserted in the screw slot, the upper edge of the casing 25 presseddown towards the screw, and the handle II slid to a position where it can be conveniently turned. Then when the handle II is rotated the blade 32 and engaged screw slot will also be caused torotate.

In addition, my novel screw driver and attachment may be employed to obtain an unusually high turning torque'much greatel than can be obtained by merely rotating the handle of the screw driver. In accordance with this feature of my screw driver the screw driver blade 32 is placedin a screw whilev the said handle is tightly gripped to prevent it irom'rotating about its own axis. VThis method feature may be employed vwhen it is desired to loosen a tight screw or to tighten a screwin its kfinal position.

If desired, a socketr wrench 36 or any other rotarytool Well known to the art may be provided Awith a shank'I-I'Iv (Fig. 6) and thus employed in place'of the'screw driver b1ade'32.

It will thus be seen that there is provided a 'device in which the several objects of this invention are achieved, and which is well adapted to meet the conditions of practical use.

` As various possible embodiments might be made of the above invention, and as various changes might be made in the embodiments above set forth, it is to be understood that all matter herein set forth or shown in .the accompanying drawing is to be interpreted as illustrative and not in a limiting sense.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

l; A rotary tool comprising an elongated shank, an auxiliary tool adapted to rotate about an axis transverse to the longitudinal axis 'of said shank, means to rotate said shank, a member slidable along and rotatable relative to said shank, said auxiliary tool being movable with saidmember and rotatable relative thereto about said transverse axis, and means carried by said member to rotate said auxiliary tool, said last named means being driven by said shank upon rotation thereof while said member is prevented from revolving with said shank by manually holding said member.

2. A rotary tool comprising an elongated shank, means to rotate said shank, an auxiliary tool, and a driving train operatively engaging said auxiliary tool at one end of said train, the opposite end of said train operatively engaging said shank and being slidable along the longitudinal axis of said shank whereby rotation of said shank will cause rotation of said auxiliary tool at any posi- .tion of said tool along the longitudinal axis of said shank.

3.y A rotary tool comprising an elongated shank, means to rotate said shank, an auxiliary tool adapted to rotate about an axis transverse to the longitudinal axis of said shank, a driving train, and a housing for said driving train, said housing being slidably and rotatably mounted on said shank, said driving train operatively engaging said auxiliary tool at one end, the opposite end of said driving train operatively engaging said shank and being slidable along the longitudinal axis of said shank whereby rotation of said shank when said housing is manually held will cause rotation of said auxiliary tool at any position of said tool along the longitudinal axis of said shank.

4. A rotary tool comprising an elongated shank, means to rotate said shank, an auxiliary tool adapted to rotate about an axis transverse to the longitudinal axis of said shank, a driving train, and a housing for said driving train, said housing being slidably and rotatably mounted on said shank, said driving train operatively engaging said auxiliary tool at one end, the opposite end of said driving train operatively engaging said shank and being slidable along the longitudinal axis of said shank, the rst named end of said driving train being revolvable with said housing about said shank whereby rotation of said shank when said housing is manually held will cause rotation of said auxiliary tool at any position of said auxiliary tool along the longitudinal axis of said shank.

5. A rotary driver tool comprising an elongated shank, an auxiliary driver tool, means to actuate said auxiliary driver tool from said shank, said actuating means being slidably but non-rotatably mounted on said shank, said auxiliary tool being slidable with said actuating means.

6. A rotary tool comprising an elongated shank, an auxiliary tool adapted to be rotated about an axis transverse to the longitudinal axis of said shank, a housing slidably and rotatably mounted on said shank, a gear slidably and non-rotatably mounted on said shank and journalled in said housing, a second gear journalled in and mounted for rotation with said housing, said second gear being driven by said iirst gear, and means driven by said second gear to rotate said auxiliary tool.

7 A rotary tool comprising an elongated shank, an auxiliary tool adapted to rotate about an axis transverse to the longitudinal axis of said shank, a bevel gear slidably and non-rotatably mounted on said shank, a housing rotatably mounted on said bevel gear, a second bevel gear meshing with said first bevel gear, said second bevel gear being journalled in and mounted for rc-tation with said housing, said secondbevel gear having an axial opening adapted to operatively receive said auxiliary tool, and means carried by said second bevel gear and projecting into said opening to releasably retain said auxiliary tool in said second gear.

FRANK P. GRAN AT. 

